let me clear a bit of confusion almost everyone will have regarding this method to find which number is a perfect sq. or not. This method only gives u the possibility of that number being a perfect square. For example, the number 160 has 0 as the unit place and the sum of all numbers is 7, so it should be a perfect square but it is not. Use this method in MCQ. If u have 145, 237, 4463 and 160 as option in a question which of these is a perfect square, u can just take out 237 and 4463 as a possibility of being the right ans as they dont have 0,1,4,5,6,9 as a unit digit so u just need to find out the square of just 145 and 160 using the actual method. Dont rely on this method to find the perfect sq. Its just to help u out
Yes If you take this number 12344 Here ten's digit is 4 which is an even number. Though this number ends with 4 and have an even number in its ten's place it is not a perfect square!!! So we can't say that the given number is a perfect square by following these techniques
Are bewkuf insan uss bnde n Bola tha ke 0,6 last digit hon to second last digit odd hona chaiye.in 160 , 0 se phle even number h🙏😂😂😂 To ye hogya n non peefrct
I'm trying to test myself on random numbers and the first one I tried was 54189. -Last digit is 9 ✓ -2nd-last digit is even ✓ -Doesn't end in 5 or 6 ✓ -Digital sum is odd (9) ✓ ...and yet when I tried and failed to work out the square root, then punched it in on the calculator, it says the square root is ~232.785308815 What did I miss? edit: After more research it looks like there are algorithms, like the one in this video, for determining if a number is NOT a perfect square. After trying the list of candidate ending numbers as a number itself (14,569), which also satisfies the given criteria, and discovering that's not a perfect prime either, I started to have my doubts.
So, if the number fails these tests it is NOT a perfect square. BUT, just because a number passes these testes does not prove that it is a perfect square. Did I understand you correctly?
@@rohitchakraborty7776 What a strange kind of temporal archaeology youtube can be. I don't even remember who I was when I wrote that, let alone where .. or why.
help kro do sir. ntpc ka sawal hein 18025 full fill all condition of perfect square but its non perfect square. how to find in exam any shortcut qstn was find the non perfect square between 21025/18025/13225/15625 factor nehi nikal k kr skte hein kya??
Digital sum of 169 is 7. (1+6+9=16=1+6=7). Digital sum is always represented in a single digit. One more tip : You need not count 9 (or the sum of numbers which give 9) when you find the digital sum of a number. As per the condition 3 stated in the video, the digital sum of a perfect square number is always ODD numbers or 4.(According to him, it means 1,3,5,7,9 and 4. ) Digital sum of a perfect square is never being 3 and 5. So Digital sum of a perfect square is either 1, 4, 7 or 9 only. Just because a number satisfies all the conditions it does not mean that the number is a perfect square. It MAY be a perfect square or NOT. There are innumerable NON-PERFECT square numbers which satisfy all the conditions. The said conditions are used only to find the NON perfect square. That is we can say that the numbers that do not satisfy any one of the conditions are NON-PERFECT square. One more thing I would say that a perfect square number ending with 5, its second last digit is always 2 and its third last digit is always 0,2 or 6.
12524 is not a perfect square number. But according to him it satisfies all the conditions.. His conditions are; 1. Any number ends with 1,4 or 9 , the second last digit should be even number. 2. Digital sum should be odd number or 4. For the number 12524 digital sum is 5. But it is not a perfect square number !
@@ishfaqahmad5541 digital sum of a perfect square number is always any one of 1,4,7 or 9. If the digital sum of a given number is any one of 2,3,5,6 or 8, then it is NOT a perfect square.
thank you your video is helpful,but are 19,35,76,91,90 perfect square? if not how can we dare to say if za unit digit of any number ending with 1,4,5,6,9 or 0 is perfect square?
Please help me in this case Jessa sir ne bataya perfect square chk krne ki teen conditions h But jb ma un conditions ko kuch numbers pr apply kr rha hu to conditions to satisfy ho rhi h but wo fir bhi perfect square nhi h. Jesse 145 is pr teeno conditions satisfy to hoti h bt ye perfect square nhi h Ya Jesse 369. If anybody can clear my doubt, then pose help.
just because 3321 satisfies all the conditions, we can't say 3321 is a perfect square. The conditions mentioned above are useful only to identify the non-perfect square.i.e.when the given number doesn't satisfy anyone of the said conditions. Only solution to identify a number whether it is a perfect square is "prime factorization method". If the number of each prime factor of a number is even, then the number is a perfect square. Otherwise it is a non-perfect square. 3321= 7*473 = 7*11*43 Here number of all the three prime numbers are odd. Hence 3321 is not a perfect square.
Prime factorize 3321. 3321 = 9*369 = 9* 9 *41 = 3*3*3*3*41 Here 3 and 41 are prime factors. Number of prime factor 3 are 4 i.e. EVEN number. But the other prime factor 41 is only one , i.e . ODD number. If any one of the prime factors is in ODD number, then it must be a Non-Perfect square. Hence 3321 is not a perfect square.
Hi Sir, I'm confused with the last rule. If the number is 14^2 = 196 = 1+9+6 = 16 the last digit is 6 which is even but it is a perfect square. Why is it like that?
There are so many nos. that are not perfect squares which satisfy all the conditions given in the video. Eg. 441, 741, 1141, 1341, 2125, 2325 and it goes on endlessly.
To find out the digital sum of a number, ignore the number 9 and numbers whose sum is 9. It is enough if you sum up the remaining number . In 169, ignore 9 and sum up the remaining numbers 1 and 6 which gives 7.
Digital sum of 344 is 2 which is not among 1, 4, 7 and 9 to be a perfect square number. One more thing. 144 is the only 3 digit perfect square number ending with 44. Other 3 digit number ending with 44 are not perfect square numbers.
I like this video a lot your 4th point is the new technique i learnd today... But in this video i was finding the basic method.... Thankyou so much for your this video it helps me to save my time a lot💕❤
Please help me in this case Jessa sir ne bataya perfect square chk krne ki teen conditions h But jb ma un conditions ko kuch numbers pr apply kr rha hu to conditions to satisfy ho rhi h but wo fir bhi perfect square nhi h. Jesse 145 is pr teeno conditions satisfy to hoti h bt ye perfect square nhi h Ya Jesse 369. If anybody can clear my doubt, then pose help.
All the perfect square numbers satisfy all the conditions referred to above. It does not mean that all the numbers that satisfy all the conditions must necessarily be a perfect square. There are innumerable NON-PERFECT square numbers that obey the above said rules. We can surely say a number which does not satisfy at least any one of the said conditions is NON-PERFECT square. From these we can infer that a number which satisfy all the said conditions MAY be a perfect square or a Non-perfect square. Only solution to find whether the given number is a perfect square is " prime factorization method" At first , 3049 is a prime number. hence it is not a perfect square. Secondly, 1849, 3249 and 8649 are only 4-digit perfect square numbers that end with '49'. Other 4-digit numbers ending with 49 are not perfect square. Hence 3049 is not a perfect square. 1849 = 43^2 = 43 * 43. Only prime factor is 43. And number of 43 is TWO. 3249 = 57^2 = 57 *57. = 19*3*19*3 . Here 19 and 3 are prime factors and their number is TWO i.e EVEN number. 8649 = 93^2 = 93*93 = 3*31*3*31 . Here 31 and 3 are prime factors and their number is TWO i.e EVEN number. All the perfect square numbers have EVEN number of prime factors. If any one of the prime factors is ODD number, then the given number is not a perfect square, though it satisfies all the conditions.
212325 also obeys all rules but unfortunately it is not a perfect square either... so can you upload another video which will help in problems like this
100s digit of a perfect square is always either 0, 2 or 6. 100s digit of 21225 is 3 which does not belong to 0, 2 and 6. Hence 212325 is not a perfect square.
let me clear a bit of confusion almost everyone will have regarding this method to find which number is a perfect sq. or not. This method only gives u the possibility of that number being a perfect square. For example, the number 160 has 0 as the unit place and the sum of all numbers is 7, so it should be a perfect square but it is not. Use this method in MCQ. If u have 145, 237, 4463 and 160 as option in a question which of these is a perfect square, u can just take out 237 and 4463 as a possibility of being the right ans as they dont have 0,1,4,5,6,9 as a unit digit so u just need to find out the square of just 145 and 160 using the actual method. Dont rely on this method to find the perfect sq. Its just to help u out
Thanks bro
Yes
If you take this number 12344
Here ten's digit is 4 which is an even number. Though this number ends with 4 and have an even number in its ten's place it is not a perfect square!!! So we can't say that the given number is a perfect square by following these techniques
Oh thank you
Are bewkuf insan uss bnde n Bola tha ke 0,6 last digit hon to second last digit odd hona chaiye.in 160 , 0 se phle even number h🙏😂😂😂
To ye hogya n non peefrct
@@varunpandeys9533 tu bewakoof usne sirf 6 bola tha
Better than most of what i learn in school, thank you and keep it up👍
This video so helpful for me, other wise I am very confused about this mater thanks a lot. This is my first view of your channel.
Very helpful Sir 👍 thank you very much ❤
I went searching for other types of problems solutions, unexpectedly got this video and it's too very helpfull
Sir is 664 is perfect square
@@PramodKumar-dq8zy no
Tq so much sir for this wonderful explanation 😊
I'm trying to test myself on random numbers and the first one I tried was 54189.
-Last digit is 9 ✓
-2nd-last digit is even ✓
-Doesn't end in 5 or 6 ✓
-Digital sum is odd (9) ✓
...and yet when I tried and failed to work out the square root, then punched it in on the calculator, it says the square root is ~232.785308815
What did I miss?
edit: After more research it looks like there are algorithms, like the one in this video, for determining if a number is NOT a perfect square.
After trying the list of candidate ending numbers as a number itself (14,569), which also satisfies the given criteria, and discovering that's not a perfect prime either, I started to have my doubts.
So, if the number fails these tests it is NOT a perfect square.
BUT, just because a number passes these testes does not prove that it is a perfect square.
Did I understand you correctly?
@@honeytubs correct. I learned elsewhere that this is the case. You can prove a number isn’t, but not necessarily that it is. 👍
Same
@@rohitchakraborty7776 What a strange kind of temporal archaeology youtube can be. I don't even remember who I was when I wrote that, let alone where .. or why.
Sir I have. No words to explain ❤️😀 you are a best teacher sir you solve all my problems
Thank you for the clear explanation.🙏
Thank you sir. Now I have understood very well and my all doubts are cleared sir again Thank you for your brief explanation.
Very nice explanation sir now I pass my test easily thanku So much sir may god bless you ....
Thanks allot Sir it was the biggest confusion in finding perfect and non perfect square you solved my Problem sir
Now I can do my exercise very easily sir and the way that you explain is same with my book 📚 I am waiting for your next video sirsss
Very helpful and interested sir👍
Very helpful class . Thank U sir
* me asking teacher a math question*
School teacher: What did you say you lil b!tch!
Random Indian teacher on TH-cam: Come here my son.
3 likes no comments let me fix that 😂
Superb sir
M impressed 👍
Mata Laxmi ki Hamesha Krupa aap pe rahe !! Yahi prathana karta hu...
Really helpful video... Thanks
Can we rely completely on digital sum
Perfect content thank you so much sir
Tysm sir this vid helped me in my dumb mathematicas exam!!
Perfectly explained Thanks
help kro do sir.
ntpc ka sawal hein
18025 full fill all condition of perfect square but its non perfect square.
how to find in exam
any shortcut
qstn was find the non perfect square between
21025/18025/13225/15625
factor nehi nikal k kr skte hein kya??
thank you bhaiya i understood it very well
Nice explanation sir!! Really a very helpful stuff for competitive exams...
It is very helpful to me thank you
Not for me
Wonderful explanation ❤my school teacher not explain this so well as you explain this in few minutes ❤ i am very grateful to you ❣️🙏
1249 is a surd but it satifies the rules . First last digit is 9 and 2nd last digit 4
There's no 4-digit perfect square number ending with "49" less than 1849.
Excellent explanation.thankyou so much
what about the square root of 169,it does not fulfil the 3rd rule,because can not give either 4 Or 9 when we add the digits
Digital sum of 169 is 7. (1+6+9=16=1+6=7). Digital sum is always represented in a single digit. One more tip : You need not count 9 (or the sum of numbers which give 9) when you find the digital sum of a number.
As per the condition 3 stated in the video, the digital sum of a perfect square number is always ODD numbers or 4.(According to him, it means 1,3,5,7,9 and 4. )
Digital sum of a perfect square is never being 3 and 5. So Digital sum of a perfect square is either 1, 4, 7 or 9 only.
Just because a number satisfies all the conditions it does not mean that the number is a perfect square. It MAY be a perfect square or NOT.
There are innumerable NON-PERFECT square numbers which satisfy all the conditions.
The said conditions are used only to find the NON perfect square. That is we can say that the numbers that do not satisfy any one of the conditions are NON-PERFECT square.
One more thing I would say that a perfect square number ending with 5, its second last digit is always 2 and its third last digit is always 0,2 or 6.
Right sir
12524 is not a perfect square number. But according to him it satisfies all the conditions..
His conditions are;
1. Any number ends with 1,4 or 9 , the second last digit should be even number.
2. Digital sum should be odd number or 4.
For the number 12524 digital sum is 5. But it is not a perfect square number !
@@ishfaqahmad5541
digital sum of a perfect square number is always any one of 1,4,7 or 9. If the digital sum of a given number is any one of 2,3,5,6 or 8, then it is NOT a perfect square.
wonderful video sir
❤thank you sir!!
Sir , how this tricks work with 7516 pls tell as this technique not work wid this number
Thank you for this
Please continue with this kind of videos, people need this 😊
First 45 seconds was more helpful 😂
very good and easy tricky method sir
Wow,What an explanation
Sir How can you find the squares very fast tell us trick
Super sir explanation was awesome
Very helpful ...Tq sir
thank you your video is helpful,but are 19,35,76,91,90 perfect square? if not how can we dare to say if za unit digit of any number ending with 1,4,5,6,9 or 0 is perfect square?
Yes this is not prefect squares coz digital sum of 76 is not odd and others also not perfect square 👆
Second last digit should be the zero or even number
Please help me in this case
Jessa sir ne bataya perfect square chk krne ki teen conditions h
But jb ma un conditions ko kuch numbers pr apply kr rha hu to conditions to satisfy ho rhi h but wo fir bhi perfect square nhi h.
Jesse 145 is pr teeno conditions satisfy to hoti h bt ye perfect square nhi h
Ya Jesse 369.
If anybody can clear my doubt, then pose help.
@@nitinvaid5350 hey in 145 there must be 2 before 5
And in 369 digital sum is 18 which is not odd and not 4.
Sir can you explain the number 176 ,which satisfying all the condition(second last digit odd and digit sum is 5) but it is not a perfect square
He said that the digital sum must be 4 or an odd no except 5.
Watch again
@@snapeasy4331 3 is also not among the digital sums of a perfect square. They are 1, 4, 7 and 9 only.
@@nammalwarthiruvengadam2925 , yes, it is mistakenly, 3 not mentioned like 5.
Thnakuuu so much sir
I tried somthing, can you confirm this?: the digital sum of a perfect square is 1, 4, 7 or 9 (more accurate than "odd or 4")
Thank you sir, but should the number satisfy all the conditions or few of them is fine.
Very helpful thanks a lot
Tqqq soo much sir 🙏🙏🙏🙏🙏
Is it possible to get digital sum of a perfect squre 3
Digital sum of any perfect square is either 1, 4, 7 or 9.
NOT 3 as said in the video.
Sir app to kamal ,ho aata tha lekin dimag nhi lagaya tha , thank you sir love you
Very helpful video for me.
Sir ek chej agr last ma 25 hoga tabhe yo parfect square ho ga
Thank you.
THANKYOU SO MUCH SIR I HAVE MY EXAM TOMMOROW AND I COULD NOT UNDERSTAND PERFECT SQUARE.
Wonderful!
Great👍 thanks...
sir according to your condition what is root 3321 is it perfect or non perfect?
as I am facing problem in this question
Non perfect
Perfect
just because 3321 satisfies all the conditions, we can't say 3321 is a perfect square.
The conditions mentioned above are useful only to identify the non-perfect square.i.e.when the given number doesn't satisfy anyone of the said conditions.
Only solution to identify a number whether it is a perfect square is "prime factorization method".
If the number of each prime factor of a number is even, then the number is a perfect square. Otherwise it is a non-perfect square.
3321= 7*473 = 7*11*43
Here number of all the three prime numbers are odd.
Hence 3321 is not a perfect square.
Prime factorize 3321.
3321 = 9*369 = 9* 9 *41 = 3*3*3*3*41
Here 3 and 41 are prime factors.
Number of prime factor 3 are 4 i.e. EVEN number.
But the other prime factor 41 is only one , i.e . ODD number.
If any one of the prime factors is in ODD number, then it must be a Non-Perfect square.
Hence 3321 is not a perfect square.
The only 4 digit perfect square ending with 21 are 1521, 3721 and 7921..
So 3321 is not a perfect square
Full interesting make this types of videos
Come bro i will teach you 😂
❤❤ Such imortant concept us give us
Uncle can u please numbers in big way plz 🙏
U teach so nice 😊
Army
Thank you sir for explaining techniques.
How did you get the 3 2 6 of 18² and the 9 4 0 9 of 97²?
97 square is correct ✔ 9409
But 18 square is wrong ❌ it will be 324
May god bless you 😀
great & easy...
Hi Sir, I'm confused with the last rule. If the number is 14^2 = 196 = 1+9+6 = 16 the last digit is 6 which is even but it is a perfect square. Why is it like that?
you must add the 1 and the 6 from 16 that you got and you then end up with 7
Thank you sir🙏🏻🙏🏻
Good presentation
Then y 149 is not falling in your rules sir,plz rply
Genius 🔥🔥🔥
Thank you
Thank you so much
7400 ends with zero but it's square root is not a whole number means it is not a perfect square. Please check.
It's very helpful sir
Thankyou Sir!
I see only few secs on I understood it❤️
Thanks sir you help me in my math
Thank you sir this is very much useful for me🎉🎉🎉🎉😊😊😊😊
It clear to understand
Thank you so much sir for this trick. I understood very well.
Thank you very much
Thank you sir
To be exact 1 4 7 or 9
Thank you 🙏
Please explain about the number 1069 and 2061
Both numbers are Non-perfect square.
Thank you for this wonderful explanation,sir.
There are so many nos. that are not perfect squares which satisfy all the conditions given in the video. Eg. 441, 741, 1141, 1341, 2125, 2325 and it goes on endlessly.
Since 741 is not a perfect square, it is an irrational number.
what about 13^2 = 169 if we do the digital sum of this we get 16 an even number
To find out the digital sum of a number, ignore the number 9 and numbers whose sum is 9. It is enough if you sum up the remaining number .
In 169, ignore 9 and sum up the remaining numbers 1 and 6 which gives 7.
But can you please explain the same in 229. The sum of all digits is 4 & 2nd last digit is even. But it's not a perfect square. Please clarify.
Between square numbers 169 and 289, there is no perfect square number ending with 9.
Hence 229 is not a perfect square number.
which method can apply for 344 .. last digit is 4 and 2nd last is even.. but still it's not the square of any natural number..
Digital sum of 344 is 2 which is not among 1, 4, 7 and 9 to be a perfect square number.
One more thing. 144 is the only 3 digit perfect square number ending with 44. Other 3 digit number ending with 44 are not perfect square numbers.
Thank you sir❤
Sir, 241 is perfect square or not...becoz it's last digit ends with 1 and second last is 4 , an even no.
There is no three digit perfect square number ending with"41" less than 441.
How to check 376 ?
The no 52
Digital sum of it is 7 that is odd no
And a perfect square never ends in 2
Is it perfect or not
Exceptions are always there
Answer is no
Perfect square number never ends with 2.
Hence 52 is not a perfect square.
Love you sir
why is 156 is not a perfect square? it has 6 at units place.
√6084 = 78 and the digital sum is 18 which is an even. But you said that it should be either any odd number or 4.
8+1=9
Respected sir there are many number which doesn't follow these rules
Do you mean perfect squares that fail these tests? Or do you mean non-squares that pass these tests?
Or both?
Examples?
I like this video a lot your 4th point is the new technique i learnd today... But in this video i was finding the basic method....
Thankyou so much for your this video it helps me to save my time a lot💕❤
Please help me in this case
Jessa sir ne bataya perfect square chk krne ki teen conditions h
But jb ma un conditions ko kuch numbers pr apply kr rha hu to conditions to satisfy ho rhi h but wo fir bhi perfect square nhi h.
Jesse 145 is pr teeno conditions satisfy to hoti h bt ye perfect square nhi h
Ya Jesse 369.
If anybody can clear my doubt, then pose help.
I went through your complete video but if I take the number 3049 which satisfied all condition but still is a imperfect squre
All the perfect square numbers satisfy all the conditions referred to above.
It does not mean that all the numbers that satisfy all the conditions must necessarily be a perfect square.
There are innumerable NON-PERFECT square numbers that obey the above said rules.
We can surely say a number which does not satisfy at least any one of the said conditions is NON-PERFECT square.
From these we can infer that a number which satisfy all the said conditions MAY be a perfect square or a Non-perfect square.
Only solution to find whether the given number is a perfect square is " prime factorization method"
At first , 3049 is a prime number. hence it is not a perfect square.
Secondly, 1849, 3249 and 8649 are only 4-digit perfect square numbers that end with '49'. Other 4-digit numbers ending with 49 are not perfect square.
Hence 3049 is not a perfect square.
1849 = 43^2 = 43 * 43. Only prime factor is 43. And number of 43 is TWO.
3249 = 57^2 = 57 *57. = 19*3*19*3 . Here 19 and 3 are prime factors and their number is TWO i.e EVEN number.
8649 = 93^2 = 93*93 = 3*31*3*31 . Here 31 and 3 are prime factors and their number is TWO i.e EVEN number.
All the perfect square numbers have EVEN number of prime factors.
If any one of the prime factors is ODD number, then the given number is not a perfect square, though it satisfies all the conditions.
Good class
212325 also obeys all rules but unfortunately it is not a perfect square either... so can you upload another video which will help in problems like this
100s digit of a perfect square is always either 0, 2 or 6.
100s digit of 21225 is 3 which does not belong to 0, 2 and 6.
Hence 212325 is not a perfect square.
@@nammalwarthiruvengadam2925 sir what about 229
@@sahil...19 3 digit perfect square ending with '29' are 529 and 729 only.
Hence 229 is not a perfect square
Hey the Digital sum is 6. Hence its not a perfect cube
@@nammalwarthiruvengadam2925 Bro in that case, 2256^2 = 5089536 here Hundred's digit is 5 which is not satisfying your condition!!!